Mechanism for forming balls



A. W. ALBRECHT.

MECHANISM FOR FORMING BALLS.

APPLICATION FILED MAY 16. 1921.

1,432,514, Patentefi 0013.17, 1922.

Patented @ct. l7, 3192?.

entries srarss ALBERT W. ALBRECHT, OF ST. LOUIS, MISSOURI.

MECHANISM FOR FORMING- BALLS.

Application filed. May 16, 1921. Serial No. 470,156.

To all whom it may concern:

Be it known that I, ALBERT lV. ALBRECHT, a citizen of the United States,residing at the city of St. Louis and State of Missouri, have invented anew and useful Mechanism for Forming Balls, of which the following is aspecification.

This invention relates to improvements in mechanism for forming balls.

An object of the invention is to provide a device for stamping balls outof irregularly shaped bodies.

Another object of the invention is to provide a die whereby balls may beformed by a punching operation from irregularly shaped bodies.

Additional advantages will appear from the following detaileddescription of the invention taken in connection with the accompanyingdrawing, in which Fig. l is an elevation, partially in section,illustrating the device.

Fig. 2 is a similar view illustrating the structure at the completion ofthe ball-forming operation.

As illustrated in the drawing the invention includes a die-block 1having a cylindrical cavity 2 arranged therein. The dieblock 1 isarranged to be mounted on the bed of a punch press, any suitableconnecting means being utilized for that purpose.

In the bottom wall of the cavity 2 is an upstanding projection 3, theupper wall of which is hollowed out to form a hemispherical cavity a. Anopening from the bottom of the cavity t extends through the body of thedie-block l and an ejector in the form of a rod 5 is mounted in saidopening. The upper face of said rod has a dished portion 6 conforming tothe contour of the plane of the opening into the bottom of the cavity 4.

A plunger adapted to be mounted in the reciprocating head of the punchpress, has a cavity 8 formed in the end thereof, the cavity 8 being soformed that when the end of the plunger rests in the cavity 2 andagainst the bottom wall thereof, the upper part of the cavity 8 willform a complete spherical cavity with the cavity 4.

A vent opening 9, to prevent compression so that the plunger mayproperly seat in the cavity 2, extends from the upper wall of the cavity8 to the side of the plunger.

In utilizing the device the irregularly named cavity shaped bodies arefed into the cavity 2 in the die-block and the plunger reciprocateddownwardly, the walls of the cavity 8 seating in the space between theside walls of the cavity 2 and the exterior walls of the cylindrical.Lip-standing projection 3, thus forming the irregularly shaped body intoa perfeet sphere. The ejector device 5 may be operated through anysuitable mechanism to force the ball or sphere out of the cavity 4:after the forming operation has been completed.

I am aware that the invention may be modified in certain particularswithout departing from the spirit and scope thereof. 1 do not limitmyself, therefore, to the exact construction shown and described, butwhat I claim and desire to secure by Letters Patent, is

1. A device of the class described, comprising a die-block having acylindrical cavity therein, an Lip-standing cylindrical projection inthe center of said cavity and having a hemispherical cavity in its upperend, and a plunger adapted to seat in said first-named cavity and havinga cavity in its end to form with said second-named cavity a completespherical cavity.

2. A device of the class described, comprising a die-block having acylindrical cavity therein, an Lip-standing cylindrical projection inthe center of said cavity having a hemispherical cavity in its upperend, and a plunger adapted to seat in said first i and having a cavityin its end to form with said second-named cavity a complete. sphericalcavity and having a vent opening communicating with the cavity in saidplunger.v

3. A device of the character described, comprising a die block having acavity therein, an rip-standing projection in the center of said cavityhaving a hemispherical cavity in its upper end, and a plunger adapted toextend into said first-named cavity and having a cavity in its lower endto receive said projection, the upper end of said lastnamed cavity beinghelm-spherical to form with the second-named cavity a complete sphericalcavity, said plunger having a vent opening from the hen'ii-sphericalportion of said cavity in it to a point above the portion of the plungerthat enters the die block.

XLBETRT lV. ALBRECHT.

